SN74HC259PWR

Overview

The SN74HC259PWR is an 8-bit addressable latch from the Texas Instruments SN74HC series, housed in a 16-pin TSSOP package. It operates on a supply voltage range of 2V to 6V with a maximum operating temperature of +85°C and a minimum of -40°C. The device features non-inverting outputs with a low-level output current of 5.2mA and a high-level output current of -5.2mA. Propagation delay is specified at 13ns. Static current consumption is minimal, supporting efficient power management in digital logic applications.

Feature Summary

• Provides individual addressing for each of the eight D-type latches via dedicated address inputs.
• Features transparent data capture when the latch enable input is active, allowing direct data flow.
• Maintains stable stored data states when the latch enable signal is inactive, ensuring data retention.

Applications

• Parallel-to-serial conversion circuits requiring temporary data storage.
• Multiplexed display systems needing individual segment control.
• Microprocessor interface designs utilizing address decoding for peripheral selection.

Procurement Notes

Verify the specific suffix 'PWR' confirms the TSSOP-16 surface-mount packaging and tape-and-reel shipping configuration. Confirm RoHS compliance status matches project requirements. Ensure the operating temperature range aligns with the intended environmental conditions. Cross-reference the manufacturer part number against official datasheets to validate pinout compatibility before integration into final assemblies.

Selection Notes

Select this component when individual bit control is required within an 8-bit word structure. The HC logic family offers standard CMOS performance suitable for general-purpose digital systems. Consider the TSSOP package dimensions for PCB layout constraints. Evaluate the 2V to 6V supply range against available system voltages to ensure proper logic level interfacing without additional translation components.

Part Context

This device belongs to the SN74HC logic family, characterized by high-speed CMOS technology compatible with TTL inputs. It serves as a fundamental building block for sequential logic circuits where independent data storage per bit is necessary. The addressable nature distinguishes it from standard shift registers or parallel latches by allowing selective updating of specific bits without affecting others.

Replacement Considerations

SN74HC259PWRE4

FAQ

How does the SN74HC259PWR handle data updates?

Data is updated individually based on the address inputs. When the latch enable is active, the data at the selected address is transferred to the corresponding output.

What is the polarity of the outputs?

The outputs are non-inverting, meaning the logic state at the output matches the stored data bit.